Bed bottom



- 1,641,836 Sept. 6,1927. L. R ARMSTRONG BED BOTTOM Filed Nov. 26, 1926 'IIIIIIIIIIIIIIIIIIIII,' '"lI/I/IIII/I/ Flune 5 INVENTOR ATTORNEY Patented Sept. 6, 1927.

PATENT OFFICE.

LYMAN I. ARMSTBONG, OF SAN JOSE, CALIFORNIA.

BED BOTTOM.

Application filed November 26, 1926. Serial No. 150,953. g

It is one object of the present invention to provide a bed bottom so constructed as to give at the point of application of pressure thereto and to conform substantially to the form of the body exerting the pressure without materially altering the general level of the rest of the bottom.

It is another object of the invention to provide a bed bottom of the character indicated constructed in such a manner as to permit the elimination of the customary lateral spring elements, or connecting links.

It is also an object of the invention to rovide a bed bottom of the character indicated that will incorporate in the one structure a perfectly water-proof fabric as well as a suitably resilient supporting bottom.

Finally, it is an object to provide a bed bottom of the character indicated that will be economical to manufacture, strong. rable and highly efficient in itspractical application, and onethat may be used in conjunction with a. suitable padding for providing an insulating mattress or bed bottom that will effectually prevent the transmission of heat or cold therethrough.

Fig. 1 is a fragmentary plan view of the bed bottom mounted upon the bed frame. Fig. 2 is a cross section of the bed bottom and Fig. 3 illustrates the structure of the cover sheet for the bed bottom and shows portions of the bed frame.

In effecting my invention 1 build up a fabric of stringscords, or any suitable elements of like nature, these several elements being indicated by the reference character 1. These elements 1 all extend in the same,

direction with each element looping around first the element on one side as at 2, and then around the element on the other side as at 3. Each element loops around the adjoining one but once in each instance as clearly shown in Figure 3, and no ties of any kind are used. The fabric may be woven closely or loosely as the case maybe, and when prepared is imbedded in a thin sheet of rubher 4. v

While this fabric'may be used alone upon occasion, I prefer to build up a bed-bottom by combining two sheets of the fabric with a filling of suitable fibre or other heat inthat when the fabric is in position an sulating material therebetween as shown at 5. In this construction I combine in the one article the resiliency of a spring bottom, the warmth of a mattress, together with strength, comfort, durability and waterproofing.

Wh-en'the bed-bottom is ready for use one end is mounted upon the end 6 of a bed frame 7 and the other end is mounted upon aroller 8 mounted in the bed frame and held against movement by any suitable device such as a dog and ratchet indicated at 9.

It is clear from the foregoing description drawn taut by operating the roller 8 a perfectly waterproof bed-bottom is provided, and one that conforms very closely to the form of the body placed upon it, and one that insulates the body from the cold air below. While the tensioning of the fabric by the roller. draws the fabric taut and consequently draws the several elements 1 closely together, a weight placed upon the supported fabric draws the elements still more closely together at its point of application but tends to spread the elements apart on either side thereof. The rubber in which the elements are imbedded cooperates with the woven elements themselves in resisting this tendency to spread, and an exceptionally strong and resilient bedrbottom is secured.

It isto be understood, of course, that while I have herein shown and described but one specific embodiment of the invention, changes in form, construction and method of application may be made within the scope of the appended claim.

I claim An article of the character described, comprising a sheet of heat insulating material and a sheet of fabric arranged on either side thereof to form a closed chamber, each sheet of fabric comprising a. plurality of threadlike elements extending in the same direction. each element looping once around the adjacent elements on each side thereof and passing alternately from one to the other, the woven elements being imbedded in rubber.

LYMAN P. ARMSTRONG; 

